Yeah, I've had now a couple decades of experience dealing with this, and my typical strat is to "step back" from the requested change, find out what the bigger goal is, and usually I will immediately come up with a completely different solution to fulfill their goal(s). Usually involving things they hadn't even thought about, because they were so focused on that one little thing. When looking at the bigger picture, suddenly you realize the project contains many relevant pieces that must be adjusted to reach the intended goals.